Norton 66253262704 Surface Grinding Wheel 12in 46 Grit

Product Description

The NORTON 66253262704 is a Type 1 vitrified aluminum oxide surface grinding wheel engineered for precision stock removal on ferrous metals and specialty alloys. Measuring 12 inches in diameter, 1 inch thick, with a 3-inch arbor hole, this wheel carries a 46 grit coarse grade and J hardness code, placing it in the medium-hardness range suitable for controlled, consistent cutting action. The vitrified bond provides rigidity and porosity control, while the semi-friable aluminum oxide abrasive self-sharpens during use. Rated at a maximum of 2,070 RPM, it is sized for industrial surface grinders and CNC cutting tool machines operated by machinists and grinding specialists.

This wheel is well suited for surface grinding operations on soft carbon steels, tool steels, and super alloys in both production and tool-room environments. The 38A series designation identifies it as a Norton 38A-grade white aluminum oxide formulation, recognized in precision grinding for its cool-cutting characteristics on heat-sensitive materials. Typical applications include flat surface work on surface grinders and profile grinding on cylindrical grinders where consistent finish and dimensional control are required.

Key Features

• 46 grit coarse grade for aggressive stock removal with controlled surface finish
• J hardness (medium) balances wheel wear rate against cutting efficiency on soft and medium-hardness workpieces
• Vitrified bond provides dimensional stability and resistance to oils and coolants used in wet grinding
• Semi-friable aluminum oxide abrasive self-sharpens to maintain cutting performance throughout wheel life
• Type 1 straight wheel profile fits standard surface grinder spindle configurations
• White wheel color indicates aluminum oxide composition for visual identification at the machine

Compatibility

Designed for use with CNC cutting tool machines, cylindrical grinders, and surface grinders. Suitable for grinding soft carbon steels, tool steels, and super alloys. Confirm spindle speed does not exceed the 2,070 RPM maximum rated speed before mounting.

Installation Notes

Mounting and dressing of abrasive grinding wheels must be performed by qualified personnel following ANSI B7.1 safety standards for the use, care, and protection of abrasive wheels. Power down and lock out the grinder before mounting. Inspect the wheel for cracks or chips using the ring test before installation, and never exceed the marked maximum operating speed. A proper wheel blotter and flanges of correct diameter must be used to distribute clamping load evenly.